JPS6215913Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cassette tape used in a fixed magnetic head type magnetic recording/reproducing device, and more particularly to a cassette tape having a guide member for reliably positioning the magnetic tape between a capstan and a pinch roller. It is something.

A cassette tape is designed to be easily attached to and removed from the tape drive mechanism of a magnetic recording/reproducing device.The cassette half consists of two upper and lower tapes, and a pair of rotatable hubs are attached to the cassette half, and the magnetic tape is wound around this hub. That's what I do.

Most of the cassette tapes commonly used today are used in movable magnetic head type recording and reproducing devices, such as movable magnetic head type cassette tape recorders, in which the magnetic head is inserted into the cassette tape during recording and playback. It is configured so that a tape is brought into contact with it for recording and playback.

By the way, the movable magnetic head type tape recorder has poor recording and reproducing characteristics due to the movement of the magnetic head.Recently, fixed magnetic head type tape recorders with superior characteristics have been developed.

An example of a fixed magnetic head type cassette tape devised based on this is shown in FIG. In the figure, reference numeral 1 denotes a cassette half that is divided into two parts vertically, and one side of the cassette half 1 has a magnetic head insertion window 2 and a pinch roller insertion window 3.
a, 3b are formed, and capstan insertion holes 4a, 4b are also formed. Also, cassette half 1
A pair of hubs (not shown) are rotatably supported approximately in the center of the magnetic tape 5, and a magnetic tape 5 is wound around the hubs. The magnetic tape 5 is guided by guide rollers 6a, 6b and an impedance roller 7 along insertion windows 2, 3a, 3b formed on the front surface of the cassette half 1.

When such a cassette tape is loaded into the cassette chamber of a fixed magnetic head type cassette tape recorder, the fixed magnetic head 11 is loaded as shown in FIG.
The insertion hole 2 faces the magnetic head 11, and a tape pin 12 disposed in front of the magnetic head 11 contacts the tape 5 to move the tape 5 away from the magnetic head 11. As a result, the running path of the tape 5 is guided to the back of the cassette half 1 from the center point A of the insertion hole 4a of the capstan, as shown by the dashed line. On the other hand, on the insertion hole 4b side of the capstan, the tape 5 is attached to the guide roller 6b.
Since the tape 5 is guided by the impedance roller 7, the tape 5 runs on a common tangent line between the guide roller 6b and the impedance roller 7. Therefore tape 5
As shown in FIG. 1, the travel path is guided to the back of the cassette half 1 from the center point A' of the insertion hole 4b of the capstan.

Therefore, when a cassette tape is loaded into a fixed magnetic head type cassette tape recorder in this state and a recording or playback operation is performed, the insertion holes 4a and 4b are inserted.
Since a capstan having a tapered tip is inserted into the capstan, the tape 5 is no longer inserted between the capstan and the pinch roller. This makes it impossible for the tape 5 to run, making recording and playback impossible.

This invention was made in order to solve the above problems, and the magnetic tape stored in the cassette half, which has an insertion window for the fixed magnetic head and the pinch roller, and an insertion hole for the capstan, can be inserted into the capstan. An object of the present invention is to provide a cassette tape in which the tape can be reliably inserted between the capstan and the pinch roller by providing a guide member that restricts the insertion window of the pinch roller from the center point of the hole. .

An embodiment of this invention will be described below with reference to the drawings. FIG. 3 shows an example in which this invention is applied to a cassette tape applied to a double capstan type fixed magnetic head type cassette tape recorder. In the figure, 21 is a cassette half composed of two upper and lower parts, and this cassette half 21
A pair of capstan insertion holes 22a and 22b are provided on the front surface of the unit to correspond to a double capstan (not shown).
and a capstan insertion hole 22.
a, 22b to form pinch roller insertion windows 23a, 23b. Further, an insertion window 24 for a fixed magnetic head is formed between the insertion windows 23a and 23b.

A pair of hubs 25 and 25b are rotatably supported approximately at the center of the cassette half 21, and the magnetic tape 26 is wound with one end of the magnetic tape 26 fixed to each hub 25a and 25b. ing. This tape 26 is a guide roller 27a.
27d and the impedance roller 28 along the respective insertion windows 23a, 23b, 24 formed on the front surface of the cassette half 21.

Guide members 29a and 29b are provided to restrict the travel path of the magnetic tape 26 from the center points A and A' of the capstan insertion holes 22a and 22b to the pinch roller insertion portions 23a and 23b. In the illustrated example, the guide member 29a is formed into a curved vertical wall along the edge of the capstan insertion hole 22a as shown in FIG. 3B. Sliding surface 3 of this guide member 29a
0 is set to be slightly away from the common tangent of the guide roller 27a and the impedance roller 28, that is, from the tape running path, as shown in FIG. On the other hand, the guide member 29b is formed in a semicircular vertical wall along the edge of the tape guide insertion hole 31. At this time, as shown in FIG. 4, the position of the sliding surface 32a of the guide member 29b is such that the line connecting the sliding surface 32a and the contact point of the impedance roller 28, that is, the running path of the tape, is from the center point A' of the capstan insertion hole 22b. It is set so that it can be restricted to the side of the pinch roller insertion window 23b.

When this cassette tape is inserted into the cassette chamber of a fixed magnetic head type cassette tape recorder,
As shown in FIG. 5, the tape pin 41 and the magnetic head 42 are inserted into the magnetic head insertion window 24. At this time, the tape pin 41 disposed in front of the magnetic head 42 moves the tape 26 away from the magnetic head 42. Due to this operation, the tape 26 is pressed against the sliding surface 30 of the guide member 29a, but the running path of the tape 26 is regulated by the sliding surface 30 and is outside the center point A of the capstan insertion hole 22a, that is, the pinch roller insertion It is restricted to pass through the window 23a side.

Next, when you perform a recording or playback operation in this state, the capstan 4, which has a tapered tip,
3 is inserted from the capstan insertion hole 22a, the tape 26 is guided by the tapered part of the capstan 43 and positioned on the outside as shown in FIG.
A pinch roller 44 is brought into contact with the capstan 43 via the tape 26. At the same time, the tape pin 41 retreats to the rear of the magnetic head 42.
As shown in the figure, the tape 26, to which a suitable tension is applied by a pair of capstans 43 and pinch rollers 44, is pressed against the magnetic head 42 and brought into close contact with it.

Therefore, according to such a configuration, tape 2
6 is regulated by the guide members 29a and 29b, so that the tape 26 can always be guided between the capstan 43 and the pinch roller 44. Therefore, the tape 26 receives the pressure of the pinch roller and absorbs the driving force of the capstan. This allows the vehicle to run at a predetermined speed.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

In the above embodiment, the tape guide member is formed in the shape of a wall, but in this invention, it can also be formed in the shape of a pin, for example, as long as it can regulate the running path of the tape.

As described above, according to this invention, the magnetic tape stored in the cassette half, which has a fixed magnetic head, a pinch roller insertion window, and a capstan insertion hole, is inserted into the pinch roller from the center point of the capstan insertion hole. By providing a regulating guide member on the window side, it is possible to provide a cassette tape that can reliably insert the tape between the capstan and the pinch roller.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the main parts of a conventionally conceived cassette tape for a fixed magnetic head, Fig. 2 is a plan view for explaining Fig. 1, and Fig. 3a is an example of an implementation of this invention. FIG. 3b is a cross-sectional view showing a part of the main part of the same embodiment, FIG. 4 is a plan view showing the main part of the same embodiment, and FIGS. 5 to 7 are the same embodiment. FIG. 3 is a plan view for explaining an example. 1... Cassette half, 2... Magnetic head insertion window, 3a, 3b... Pinch roller insertion window, 4a, 4b... Capstan insertion hole, 5...
...Magnetic tape, 6a, 6b...Guide roller, 7
... Impedance roller, 11 ... Fixed magnetic head, 12 ... Tape pin, 21 ... Cassette half, 22a, 22b ... Capstan insertion hole, 23a, 23b ... Pinch roller insertion window, 24 ... Fixed type Insertion window for magnetic head, 25
a, 25b...Hub, 26...Magnetic tape, 27
a to 27d... Guide roller, 28... Impedance roller, 29a to 29b... Guide member, 3
0... Sliding surface, 31... Tape guide insertion hole,
32...Sliding surface, 41...Tape pin, 42...
Magnetic head, 43...capstan, 44...pinch roller.

Claims (1)

[Claims for Utility Model Registration] (1) A cassette half having a fixed magnetic head and a pinch roller insertion window and a capstan insertion hole, and a pair of cassette halfs rotatably supported within the cassette half. A hub, a magnetic tape wound around the hub and guided along each window of the cassette half, and a guide for regulating the magnetic tape from the center point of the insertion hole of the capstan to the side of the insertion window of the pinch roller. A cassette tape characterized by comprising: (2) The cassette tape according to claim 1, wherein the tape guide member is provided near the insertion hole of the capstan. (3) The cassette tape according to claim 1, wherein the tape guide member is provided near the insertion hole of the tape guide. (4) The cassette tape according to claims 1 to 3, wherein the tape guide member is formed into a wall shape. (5) The cassette tape according to claims 1 to 3, wherein the tape guide member is formed into a pin shape.